MJS水平旋喷桩在顶管工程中的应用

Application of MJS Horizontal Rotary Jet Grouting Pile in Pipe Jacking Engineering

随着城市的规划布局不断完善,各城市的基础设施趋于完善,同样在完善基础设施的同时,势必会与已存在的建/构筑物产生交叉、冲突,因此在城市建设过程中对原有建/构筑物的保护和利用就尤为重要。在广州白云机场排渠扩建工程的施工过程中,新建的灌溉渠(李溪干渠)与在建的新白广城际铁路高程存在干扰和影响,采用双层顶管下穿城际铁路的工艺,在顶管施工之前采用MJS水平旋喷桩对城际铁路下方土体进行加固,确保在建城际铁路的结构安全。

With the continuous improvement of urban planning and layout,the infrastructure of each city tends to be improved.While improving the infrastructure,it is bound to intersect and conflict with existing buildings/structures.Therefore,it is particularly important to protect and utilize existing buildings/structures in the process of urban construction.During the construction process of the expansion project of the drainage channel at Guangzhou Baiyun Airport,there was interference and influence between the newly built irrigation channel(Lixi main channel)and the elevation of the ongoing new Baiguang intercity railway.The double-layer pipe jacking process was used to penetrate the intercity railway.Before the pipe jacking construction,MJS horizontal rotary jet grouting piles were used to reinforce the soil beneath the intercity railway,ensuring the structural safety of the ongoing intercity railway.